Elevator for silos.



S. 0. BUMGARNER.

ELEVATOR FOR SILOS.

\APPLICATIOVN mm MAR. 10. 1916.

iwoaas.

Patented Sept. 25, 1917.

2 SHEETSSHEET 2.

Wilncoom STEPHEN o. BUMGARNER, or eryniv, OHIO.

'EIiEVflTOR non srnos.

Specification of Letters Patent. *Pfmtgntqgd Sept 25, 19111 7,

Application filedMarch 10, .1316. Serial No. 83,340.

To all whom it may concern.

Be it known thatI, STEPHEN O. ,BUMGAR- man, a citizen of the United States,,residing at Given, in the county of Pike and State of Ohio, have invented certain new and useful Improvements in Elevators for Silos; and I do'hereby declare the following to be ajfull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The object of this invention is to provide a novel type of elevator for association with asilo, chute, which will admit of a personbeing carried to anypoint desired throughout the height of the interior of the silo chute.

Another obj ectof theinvention is to provide a novel type of looking Ineansfonhold ing the elevator, when stopped, at -a ny point throughout the height of the silo and :for automatically locking :the elevator when moved to its maximum loweredposition and when the operator steps from the platform of the elevator carriage.

Other objects will :appear-and be better understood from that embodiment of my invention of which the following-is a specification, reference being had to the accompanying drawings forming a part :thereof in which:

Figure 1 is a front elevation of a silo showing thechute thereof in section and showing the improved elevator mounted within the chute.

Fig. 2 is a horizontal section taken on the line 2--2 of Fig. 1.

Fig. 3 is a section taken on the line 33 of Fig. 1 and looking in the direction of the arrows, and

Fig. 4 is a vertical front elevation of the elevator carriage.

Fig. 5 is a sectional detail view, taken through'the upper end of one of the side walls of the chute.

Referring to the drawings more in detail, the letter A designates a silo of ordinary construction, and B one of the door openings therein, and C a chute located opposite the door openings.

Positioned within the chute C, is a pair of guides designated, respectively, by numerals 1 and 2, which have their upper ends secured to a transverse bar 3 which extends transversely of the chute G a he upper end thereofand the lower ends of the guides 1 ,andQ-have connectionwith the floor of the chute.

Mounted for travel on the guides 1 and;2, 1s anelevator carriage 4. The carriage 4E consists of a vertically disposedbody 5jhav- ,ing ts forward .side provided ,with pairs of rollers6 whiclrengagethe guides 1 and 2 so as to minimize the frictionalengagement between theguides l and 2 and theelevator carriage. The vertical body .5 of the carriage has .its lower end ,provided with a platform ,7, said platform be ng provided adjacent its opposite end with passages 8 forthe passage of the guides 1 andQ. -11

cable 9;.i s located withinithechute C andhas its upper endpassing over a sheave 10 which is ;.rotatable through an opening llat the upper end of one side of .the chute, and

keyed to a shaft which is j ournaled I in bearings of, the upper end of theside ofa chute and the said cable Q-hEWingthe upper terminal thereof provided itha weight .12,

which is located eXteriorly of the chute-C ;the cable 9 to hold the levers 15 in posi- :tions shown in Fig. 4E and against the ten sion of springs 16, so that the outer ends of the levers 15 which are serrated'as illustrated at 17 will be held out of engagement with the guides 1 and 2. If the cable 9 should happen to break during the travel of the carriage, the springs 16 will pull downwardly on the inner .ends of the levers 15 and cause the outer ends thereof to engage the adjacent guides 1 and 2 and force the same against a pair of blocks 18, carried by the vertical portion 5 of the carriage, resulting in the gripping of the guides between the blocks and the levers and hold the carriage against movement.

The weight of the member 12 is suflicient to overcome the combined weight of the carriage 4L and the operator, so that the operator and carriage can be elevated to the top of the silo or to any point within the silo, desired. However, when a suflicient amount of ensilage is placed on the carriage so that the weight of the member 12 will be overcome, the carriage will descend to the bottom of the chute As means for stopping the carriage at different points throughout the chute C, stopping mechanism, designated as an entirety, by the numeral 19 is provided. This mechanism consists of a vertical reciprocating shaft 20 which is normally held in raised position by means of a spring 21, and a pair of downwardly diverging links 22, the upper ends of which have connection with a foot pedal 23 carried by the upper end of the shaft 20 and the lower ends of the link are connected to the inner ends of levers 24, the outer ends of, the levers 24 being serrated, as shown at 25, and which outer ends normally engage andp'ress the guides 1 and 2 against the adjacent blocks 26 for normally holding the carriage against movement. When the operator depresses the shaft 20 the inner ends of the lever 24 will be moved downwardly and cause the outer ends thereof to be moved out of engagement "with the guides 1 and 2 and permit the travel of the carriage 4. When it is desired to,.stop the carriage at any point throughoutthe height of the chute, the shaft 20 is released resulting in the outer ends of the lever 2i pressing the guides against the blocks 26 so as to stop the travel of the carriage. The carriage will also be locked against movement when the same is in lowered position as illustrated in Fig. 8 of the drawings, and when the operator'steps from the platform 8 of the carriage.

A chain 27 has one end secured to the axle or shaft for the sheave 10 and has its opposite end connected to the upper end of a vertically disposed spring 28, the lower end of the spring having connection with the lower wall of the opening 11. During upward travel of the elevator carriage 4 and the descent of the weight 12,-the chain 27 will be wound around the shaft and effect an expansion of the spring 28 so that when the elevator carriage reaches the maximum upward point in its travel, the tension under which the spring is placed and the weight of the carriage and the operator will counterbalance the combined weight of the element 12 and that portion of the cable 9 which will be located at the outer side of the chute so that whenensilage is placed upon the carriage the latter will be caused to descend.

Having thus described my invention what I claim as new is:

An elevator carriage for a silo chute including a horizontal portion having elevator guide passages therein, a vertically disposed portion having connection with the horizontal portion at one edgefthereof, elevator guide-engaging rollers carried by the ver tically disposed portion ofthe carriage, a

pair of spaced blocks mounted adjacent the lower end of the vertically disposed portion,

the said blocks being located, respectively, adjacent the vertical edges of the vertically disposed portion, and manually controlled pivoted elevator guideengaging elements mounted on the vertical portion of the carriage and located at the lower end thereof and disposed oppositethe blocks at the lower end of the vertical portion and normally lying in elevator guide-engaging position, for the purpose specified. I

In testimony whereof I aflix my signature in presence of two witnesses.

STEPHEN o. BUMGARNER.

' Witnesses v V i Mrs. J. Lnn Tony, IDA BRAMMER.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. O. 

